On 22 June 2020, the International Health Regualtions (IHR) Focal Point (FP) of Brazil shared a preliminary report with the Panamerican Health Organization, the WHO Regional Office for the Americas of a human infection with Influenza A(H1N2) variant virus (A(H1N2)v). According to the report, the patient, a 22-year-old female, with no comorbidities, worked in a swine slaughterhouse in Ibiporã Municipality, Paraná State, and developed an influenza-like illness on 12 April 2020. The patient initially sought medical care on 14 April and a respiratory specimen was obtained on 16 April as part of routine surveillance activities. The patient was treated with oseltamivir, was not hospitalized and has recovered.
A real-time RT-PCR test conducted at the public health laboratory identified a non-subtypable influenza A virus. In May 2020, the specimen was forwarded to the Laboratory of Respiratory Virus and Measles, Oswaldo Cruz Institute (FIOCRUZ per its acronym in Portuguese), a national influenza reference laboratory, in Rio de Janeiro. On 22 June, genetic sequencing characterized this virus as an influenza A(H1N2)v virus.